SU371202A1 - METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS - Google Patents
METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDSInfo
- Publication number
- SU371202A1 SU371202A1 SU1650439A SU1650439A SU371202A1 SU 371202 A1 SU371202 A1 SU 371202A1 SU 1650439 A SU1650439 A SU 1650439A SU 1650439 A SU1650439 A SU 1650439A SU 371202 A1 SU371202 A1 SU 371202A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- fatty acids
- xylite
- xylitol
- dimethylformamide
- obtaining complex
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
1one
Изобретение относитс к способу получени сложных эфиров ксилита и жирных кислот, которые могут быть использованы как эмульгаторы , антисептики, диспергаторы и т. д.This invention relates to a process for the preparation of xylitol esters of fatty acids, which can be used as emulsifiers, antiseptics, dispersants, etc.
Известен способ получени сложных эфиров ксилита переэтерификацией эфиров низших спиртов жирных кислот ксилитом в среде пиридина в присутствии в качестве катализатора карбоната щелочного металла при 90 - 110°С, остаточном давлении 250 мм рт. ст. в токе инертного газа азота в течение 12- 24 час. Выход продуктов переэтерификации 60%.A known method for producing xylitol esters by transesterification of lower fatty acid alcohols with xylitol in pyridine in the presence of alkali metal carbonate as a catalyst at 90-110 ° C, residual pressure of 250 mmHg. Art. in a stream of inert nitrogen gas for 12-24 hours. The output of transesterification products is 60%.
С целью сокращени продолжительности процесса и увеличени выхода целевого продукта предлагаетс вести переэтерификацию эфиров жирных кислот при температуре 70- 75°С, остаточном давлении 40-70 мм рт. ст., преимущественно с применением в качестве растворител диметилформамида в присутствии потаща как катализатора при непрерывной отгонке азеотропной смеси диметилформамид-низший спирт в течение 10-12 час.Выход моноэфира 75-80%По предлагаемому способу значительно улучшаютс услови труда при замене токсичного пиридина диметилформамидом.In order to reduce the duration of the process and increase the yield of the target product, it is proposed to transesterify fatty acid esters at a temperature of 70-75 ° C and a residual pressure of 40-70 mm Hg. predominantly using dimethylformamide as a solvent in the presence of a catalyst during continuous stripping of the azeotropic mixture of dimethylformamide-lower alcohol for 10-12 hours. Monoether 75-80% yield The proposed method significantly improves working conditions when replacing toxic pyridine with dimethylformamide.
Пример 1. Смесь 456 г ксилита (влажность до 0,5%), 298 г метилстеарата, 14 г поташа и 1500 млдиметилформамидаExample 1. A mixture of 456 g of xylitol (moisture content up to 0.5%), 298 g of methyl stearate, 14 g of potash and 1500 ml of dimethylformamide
(«Лч 1,4299) перемешивают при температуре 70-75°С, остаточном давлении 50- 70 мм рт. ст. и непрерывной отгонке азеотропной смеси диметилформамид-метанол в течение 8-10 час. Затем добавл ют 3,5 мл обессоленной воды, ведут реакцию еще 2 час, после чего полностью отгон ют растворитель. Обработку готового продукта ведут одним из известных способов.(“Lh 1.4299) is stirred at a temperature of 70-75 ° C, residual pressure of 50-70 mm Hg. Art. and continuous distillation of the azeotropic mixture of dimethylformamide-methanol for 8-10 hours. Then 3.5 ml of desalted water is added, the reaction is continued for another 2 hours, after which the solvent is completely distilled off. Processing of the finished product are one of the known methods.
Получают 315 г продукта с числом омылепи 134. кислотным числом 0,5-0,7; процентом гидроксилов 15-16.Get 315 g of the product with the number of saponifiers 134. acid number of 0.5-0.7; the percentage of hydroxyls 15-16.
Пример 2. По примеру 1 из смеси 456 г ксилита (влажность до 0,5%), 228 г этиллаурата , 14 г поташа и 1500 мл диметилформамида получают 260 г продукта с числом омылени 167, кислотным числом 0,5-0,7, процентом гидроксилов 18-19.Example 2. In Example 1, from a mixture of 456 g of xylitol (moisture content up to 0.5%), 228 g of ethyl laurate, 14 g of potash and 1500 ml of dimethylformamide, 260 g of product with an saponification number of 167 and acid number of 0.5-0.7 are obtained, percentage of hydroxyls 18-19.
Предмет изобретени Subject invention
2020
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1650439A SU371202A1 (en) | 1971-04-26 | 1971-04-26 | METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1650439A SU371202A1 (en) | 1971-04-26 | 1971-04-26 | METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS |
Publications (1)
Publication Number | Publication Date |
---|---|
SU371202A1 true SU371202A1 (en) | 1973-02-22 |
Family
ID=20473434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1650439A SU371202A1 (en) | 1971-04-26 | 1971-04-26 | METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU371202A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010046726A1 (en) * | 2008-10-20 | 2010-04-29 | Chemyunion Química Ltda. | Xylitol esters and ethers applied as alternative emulsifiers, solvents, co-emulsifiers and preservative systems for pharmaceutical and cosmetic products |
-
1971
- 1971-04-26 SU SU1650439A patent/SU371202A1/en active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010046726A1 (en) * | 2008-10-20 | 2010-04-29 | Chemyunion Química Ltda. | Xylitol esters and ethers applied as alternative emulsifiers, solvents, co-emulsifiers and preservative systems for pharmaceutical and cosmetic products |
US20110251415A1 (en) * | 2008-10-20 | 2011-10-13 | Chemyunion Quimica Ltda. | Xylitol esters and ethers applied as alternative emulsifiers, solvents, co-emulsifiers and preservative systems for pharmaceutical and cosmetic products |
US8716506B2 (en) | 2008-10-20 | 2014-05-06 | Chemyunion Quimica Ltda. | Xylitol esters and ethers applied as alternative emulsifiers, solvents, co-emulsifiers and preservative systems for pharmaceutical and cosmetic products |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR20120056844A (en) | Process for the purification of crude glycerol | |
EP1081126A2 (en) | Process for the preparation of plasticiser esters | |
US2515304A (en) | Hydrolysis of 2,5-dihydrofurans to produce unsaturated dicarbonyl compounds | |
SU371202A1 (en) | METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS | |
US3943167A (en) | Process for preparing trans-chrysanthemic acid | |
JPS61152726A (en) | Production of modified poly(tetramethylene ether)glycol | |
JPS622568B2 (en) | ||
EP1672053B1 (en) | High purity palm monoglycerides | |
US3959389A (en) | Method of manufacturing alkylene oxide adducts of an aliphatic alcohol | |
SU427923A1 (en) | METHOD FOR OBTAINING COMPLEX ETHERS OF UNCONTENT PURPOSE OF OXYCARBONIC ACIDS | |
US3932531A (en) | Method of manufacturing alkylene oxide adducts of an aliphatic alcohol | |
SU448636A3 (en) | The method of obtaining trans-chrysanthemic acid | |
SU455090A1 (en) | The method of producing esters of penta-0- / -carboxyethyl / -xylite | |
Javaid et al. | Selenium Dioxide Oxidation of Styrene and Norbornene | |
JP3168700B2 (en) | Method for producing sucrose fatty acid ester | |
SU98700A1 (en) | Method for preparing chlorophenoxyacetic acid esters | |
JP2002234886A (en) | Method for producing acetal | |
JPS6210521B2 (en) | ||
SU639889A1 (en) | Method of obtaining b-(n-anabasine)ethyl ether of methacrylic acid | |
SU322986A1 (en) | The method of producing cyclopropanecarboxylic acid esters | |
JP2001181271A (en) | Method for producing alpha-monoglyceride ketal | |
JPS6345660B2 (en) | ||
SU563415A1 (en) | Method of producing 2-(1-hydroxyethyl)-4.5.6.7-tetrahydroiso-(or methanoiso)indoles | |
JP2002234862A (en) | Method for producing monoglyceride | |
SU975704A1 (en) | Process for producing ethyleneglycol monoformiate |